Raspbian (Linux)
You can access the SRAM via this file:
/sys/devices/platform/soc/3f804000.i2c/i2c-1/1-006f/nvram
Just keep in mind the limit of 64 bytes.
REXYGEN
In REXYGEN, there is an internal mechanism for handling persistent variables, which stores the values on a permanent storage medium (hard drive, SD card, eMMC, etc.).
Still, you can use the SILO function block to access the SRAM via this file:
/sys/devices/platform/soc/3f804000.i2c/i2c-1/1-006f/nvram
Keep in mind the limit of 64 bytes.
Codesys
It is recommended to use the MCP7941x library by Aliazzz.
Keep in mind the limit of 64 bytes.